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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1353 (Engine Mechanical - 1.8L (LNK)) >> Diagnostic Information and Procedures >> Upper Engine Noise, Regardless of Engine Speed

Upper Engine Noise, Regardless of Engine Speed

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Upper Engine Noise, Regardless of Engine Speed

Cause Correction
Low oil pressure
Improper lubrication to the valve train Inspect the following components, and repair or replace as required:
  • Restricted oil filter
  • The valve lifter
  • The valve lifter bore
  • The oil filter bypass valve
  • The oil pump and pump screen
  • The engine block oil galleries
Broken valve spring Replace the valve spring.
Worn or damaged valve lifter bore Repair or replace as required.
Worn or dirty valve lifters Replace the valve lifters.
Stretched or broken timing chain and/or damaged sprocket teeth Replace the timing chain and sprockets.
Worn engine camshaft lobes
  • Inspect the engine camshaft lobes.
  • Replace the camshaft and valve lifters as required.
Worn valve guides or valve stems Inspect the following components, and repair as required:
  • The valves
  • The valve guides
Stuck Valves
Carbon on the valve stem or valve seat may cause the valve to stay open.		 Inspect the following components, and repair as required:
  • The valves
  • The valve guides
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